1 files changed, 114 insertions, 0 deletions
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/CherryPickCommit.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/CherryPickCommit.java
new file mode 100644
index 0000000000..4980975af7
--- /dev/null
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/CherryPickCommit.java
@@ -0,0 +1,114 @@
+// Copyright (C) 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.change;
+
+import com.google.common.base.Strings;
+import com.google.gerrit.extensions.api.changes.CherryPickInput;
+import com.google.gerrit.extensions.common.ChangeInfo;
+import com.google.gerrit.extensions.restapi.BadRequestException;
+import com.google.gerrit.extensions.restapi.ResourceConflictException;
+import com.google.gerrit.extensions.restapi.RestApiException;
+import com.google.gerrit.reviewdb.client.Branch;
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.reviewdb.client.RefNames;
+import com.google.gerrit.server.CurrentUser;
+import com.google.gerrit.server.git.IntegrationException;
+import com.google.gerrit.server.permissions.PermissionBackend;
+import com.google.gerrit.server.permissions.PermissionBackendException;
+import com.google.gerrit.server.permissions.RefPermission;
+import com.google.gerrit.server.project.CommitResource;
+import com.google.gerrit.server.project.ContributorAgreementsChecker;
+import com.google.gerrit.server.project.InvalidChangeOperationException;
+import com.google.gerrit.server.project.NoSuchProjectException;
+import com.google.gerrit.server.update.BatchUpdate;
+import com.google.gerrit.server.update.RetryHelper;
+import com.google.gerrit.server.update.RetryingRestModifyView;
+import com.google.gerrit.server.update.UpdateException;
+import com.google.gwtorm.server.OrmException;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+import java.io.IOException;
+import org.eclipse.jgit.errors.ConfigInvalidException;
+import org.eclipse.jgit.revwalk.RevCommit;
+
+@Singleton
+public class CherryPickCommit
+    extends RetryingRestModifyView<CommitResource, CherryPickInput, ChangeInfo> {
+  private final PermissionBackend permissionBackend;
+  private final Provider<CurrentUser> user;
+  private final CherryPickChange cherryPickChange;
+  private final ChangeJson.Factory json;
+  private final ContributorAgreementsChecker contributorAgreements;
+
+  @Inject
+  CherryPickCommit(
+      RetryHelper retryHelper,
+      Provider<CurrentUser> user,
+      CherryPickChange cherryPickChange,
+      ChangeJson.Factory json,
+      PermissionBackend permissionBackend,
+      ContributorAgreementsChecker contributorAgreements) {
+    super(retryHelper);
+    this.permissionBackend = permissionBackend;
+    this.user = user;
+    this.cherryPickChange = cherryPickChange;
+    this.json = json;
+    this.contributorAgreements = contributorAgreements;
+  }
+
+  @Override
+  public ChangeInfo applyImpl(
+      BatchUpdate.Factory updateFactory, CommitResource rsrc, CherryPickInput input)
+      throws OrmException, IOException, UpdateException, RestApiException,
+          PermissionBackendException, ConfigInvalidException, NoSuchProjectException {
+    RevCommit commit = rsrc.getCommit();
+    String message = Strings.nullToEmpty(input.message).trim();
+    input.message = message.isEmpty() ? commit.getFullMessage() : message;
+    String destination = Strings.nullToEmpty(input.destination).trim();
+    input.parent = input.parent == null ? 1 : input.parent;
+    Project.NameKey projectName = rsrc.getProjectState().getNameKey();
+
+    if (destination.isEmpty()) {
+      throw new BadRequestException("destination must be non-empty");
+    }
+
+    String refName = RefNames.fullName(destination);
+    contributorAgreements.check(projectName, user.get());
+    permissionBackend
+        .user(user)
+        .project(projectName)
+        .ref(refName)
+        .check(RefPermission.CREATE_CHANGE);
+
+    try {
+      Change.Id cherryPickedChangeId =
+          cherryPickChange.cherryPick(
+              updateFactory,
+              null,
+              null,
+              projectName,
+              commit,
+              input,
+              new Branch.NameKey(rsrc.getProjectState().getNameKey(), refName));
+      return json.noOptions().format(projectName, cherryPickedChangeId);
+    } catch (InvalidChangeOperationException e) {
+      throw new BadRequestException(e.getMessage());
+    } catch (IntegrationException e) {
+      throw new ResourceConflictException(e.getMessage());
+    }
+  }
+}